i not sure if using the filter is wise idea, because last time i tried it generated fog / moisture between the air space.
I was roaming around with my camera in open sun though beach.
It happened could be some reasons as per my research:
I was driving in my car AC on and it was cold inside the car while fitting the filter and the air space was also same cold when compared to open atmosphere of beach.
This is what I think, not sure
Similar situation happened to me twice and as soon as i removed the filter picture was very clear.